The 2001 Mazda B2500 is a 2-door, 3-seat Regular Side, available in 4 trims, ranging from the Base to the Base. Upon introduction, the $12,345 Base is equipped with a standard 2.5L, 4-cylinder, engine that achieves 22-mpg in the city and 26-mpg on the highway. a Manual transmission is standard. The $15,545 Base is equipped with a standard 2.5L, 4-cylinder, engine that achieves 20-mpg in the city and 24-mpg on the highway. an Automatic transmission is standard.